The official Jelly Bean update for the international Samsung Galaxy S2 (GT-i9100) has started to roll out, starting with unlocked handsets in Spain. The update is based on Android 4.1.2, and features all the benefits you'd expect from that version of the OS, including "Project Butter" performance enhancements and the new Google Search with Google Now.
What's also new is the "TouchWiz Nature UX" from Samsung's 2012 line-up, which has been back-ported to the Galaxy S2 along with Jelly Bean. This means S2 owners will be in for some pretty sweeping visual changes when they apply this latest firmware update. (The ICS update for 2011 Samsung phones was of course based upon the older TouchWiz 4 UI.) Galaxy S2 owners are also set to inherit a bunch of Galaxy S3 features in their Jelly Bean update, including Direct Call, Smart Stay and Pop-up Play (picture-in-picture video).
Right now the update is only available for Spanish Galaxy S2 phones, so other territories may have to wait a few days or weeks for localized firmware to be released. In particular, we wouldn't hold our breath for an immediate release on any of the U.S. Galaxy S2 models. Regardless, it's great to see the latest updates rolling out for an almost two-year-old handset.